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Information spreading via mobile ad hoc connections is a frequently investigated research topic today. However, studying the characteristics of application spreading by exploiting direct connections between the user devices has not got too much attention so far. In this paper, we use Closed Queuing Networks to model application spreading in such a way, and to capture the users' behavior, too. With our model we are able to investigate the following issues: 1) how many pieces of a given application can be sold in a given population; and 2) how much time is needed to reach the state in which there is no more interest in the population to purchase the application. We give analytical approximations on the lower and upper bounds of the number of application purchases and validate our results via simulations. Moreover, we present some simulation results to show trend lines which demonstrate the influence of our model's parameters on the application spreading process.